<!DOCTYPE html>
<html lang="zh-CN">

<head>

  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">

  <title>星星背景</title>

  <style>
    body {
      margin: 0;
      padding: 0;
      overflow: hidden;

      height: 100vh;
      background: radial-gradient(at top, #12313b, #000822);
    }
  </style>

</head>

<body>

  <canvas id="overlay-bg"></canvas>

  <script src="./js/overlay-bg.js"></script>

</body>

</html>